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IPhone 4 battery case
***0 mAh (Li-Pol) battery pack for IPhone 4 with luxuary cool aluminum alloy back, functional connector for data transmition and LED power indicator. Up to *3 more hours talking time.*

Specifications
*-Compatibility:IPhone 4
*-Capacity:***0 mAh (Li-Pol) 
*-Output voltage:5V
*-Output current: **0mAh
*-Input Voltage:5V
*-Input current:  **0mAh
*-Charging time:3hours
*-Material:  back cover made of aluminum alloy, front cover made of  Polycarbonate
*-Weight:*5g
*-product dimension:**5(L)×*1(W)×*6.5(T)(mm)
 
Key Facts 
*-Talk time:Up to 6.*5 hours on 3G; Up to *3.3  hours on 2G (GSM model only)
*-Standby time: Up to **5 hours
*-Internet use: Up to 5.7 hours on 3G; Up to 7.5 hours on Wi-Fi
*-Video playback: Up to 9.5 hours
*-Audio playback:Up to *8 hours

Key Features
*-Built-in rechargeable lithium-ion battery
*-Charging via USB to computer system or power adapter
*-Adherence to hardware testing standard of iPhone
*-can be used as a protective case
*-solution to IPhone 4 signal problems
*-Functional connector for data transmission.
*-On/off power switch design enabling securer and longer use of backup battery
*-Superb LED power indicator                
*-back cover made of aluminum alloy and coated with rubber paint

 Joysimple Commitment
Fast responding:
Inquiries will be responded within *4 hours. 
Professional communications:
Sales and customer service team equipped with staffs who are patient, know well about products, speak and write excellent English.
Reasonable price:
With strong cost consciousness, we do our best to control product cost - not the lowest, because we believe the lowest price is more often a result at the cost of poor quality and services. 
Low commission sourcing:
Best sourcing service for old customers, making full use of many excellent sister factories, we provide professional sourcing service at a low commission rate.
Quality control:
Care for what customer cares; meet customer`s demands and satisfaction by providing the most suitable and qualified products and service.